audreyc12
audreyc12 audreyc12
  • 03-11-2016
  • Mathematics
contestada

solve without a calculator log_4(20)-log_4(45)+log_4(144)

Respuesta :

Аноним Аноним
  • 03-11-2016
log₄20-log₄ 45+log₄144=
log₄(20/45)+log₄144=                        (log_a b- log_a c=log_a  (b/c) )
log₄[(20*144)/45]=                             (log_a b +log_a c=log_a (b*c) )
log₄(2880/45)=
log₄(64)=n     ⇔      4^n=64                (log_a x=n   ⇔ a^n=x)

4^n=4³      ⇒n=3                                 (64=4*4*4=4³)

Answer: log₄20-log₄ 45+log₄144=3

Answer Link

Otras preguntas

what is the dreadful oracle that was delivered to King Acrisius?
A main effect of speculative investment during the 1920s was that it A. Contributed to the stock market crash of 1929. B. Led to great economic growth. C. Re
Many years ago, the ping command had a bug that allowed malicious users to send malformed ping packets to a destination causing the __________ issue.
Please help!!!!!!!!!!!!
Solve the inequality, H-16<_-24
what is the dreadful oracle that was delivered to King Acrisius?
A patient has been living with dilated cardiomyopathy for several years but has experienced worsening symptoms despite aggressive medical management. the nurse
Choose the correct answer to complete each sentence. Ayer yo (nadar) en la playa. nado Voy a nadar nadé nadabas nadaste
How would most Spanish speakers ask a friend for his or her phone number?
the product of twice a number and 7